Heel-plate for ice-skates.



E. HUNOLD.

HEEL PLATE FOR ICE SKATES.

APPLICATION FILED AUG-8. 1917.

Patented Fb.19,'1918.

l ry:

HEEL-PLATE FOR ICE-SKATES.

Specification of Letters Patent.

Iatented Feb.. 19, 1918.

Application filed August S, 1917. Serial No. 185,207.

To all whom it may concern.'

Be it known that l, ERNns'r HUNOLD, a citizen of the United States, residing at Providence, in the county of Providence and State of Rhode Island, have invented a new and useful lmprovement'in Heel-Plates for Ice-Skates, of which the following is a specification.

In the use of heel plates on ice skates in which the heel plate is constructed of an aluminum alloy and the heel screw made of steel, the hard heel screw works loose in the comparatively soft aluminum alloy heel plate, particularly by the hard collar of the screw gouging into the soft metal of the heel plate. When this occurs on the skate, it has heretofore been found necessary to renew the heel plate or the heel screw or both.

The object of my invention is to improve the construction of a heel plate for ice skates, such as shown in my United States Patent No. 796,913, granted t0 me Aug. 8, 1905 whereby the heel screw is more firmly and rigidly secured in the heel plate, than has heretofore been donc.

My invention consists in the peculiar and novel construction of a heel plate and heel screw for ice skates, said heel plate being constructed of an aluminum alloy for lightness and the heel screw being formed from steel for strength, said heel plate and screw having details of construction, as will be more fully set forth hereinafter and claimed.

Figure 1 is a side view of my improved heel plate.

Fig. 2 is a top plan View of the heel plate.

Fig. 3 is a vertical sectional view through the heel plate, taken on line 3,3 of Fig. 1.

Fig. 4 is an enlarged detail sectional view of part of a heel plate showing a modified form of construction, and

Fig. 5 is an enlarged side view, partly in section of a tool used for rigidly securing the collar of the heel screw in the heel plate.

In the drawing, 6 indicates my improved heel plate constructed of an aluminum alloy and 7 the heel screw formed of steel. The heel plate 6 has, in addition to the construction shown in my patent referred to, a ccntral circular recess 8 with an undercut side wall 9 land a V shaped circumferential groove 10 formed by a tool as shown in Fig. 5. rl`he heel screw 7 has a machine screwthreaded lower end 1l which screws into a screw-threaded hole in the heel plate, a collar 12 in the recess 8 and having an inclined edge 13 rigidly secured by the undercut side wall 9 of the recess 8, oppositely disposed wrench notches 14,14, in the edge of the collar and a central stud l5 having the reduced neck portion 1G, swelling outward into the larger head portion 17 which then contracts into the pointed end 1S, the head portion to the pointed end having the wood screw-threads 19. ln the modified form as shown in Fig. l, the recess 8 has a straight side wall 2O and the collar of the heel screw 7 has a corresponding straight edge 2l.

In my new construction for rigidly securing the heel screw in the heel plate, the side wall of the recess 8 is first straight not undercut. The screw is then screwed into the heel plate, by a wrench engaging with the notches 14,14 until the collar is firmly held against the bottom of the recess 8. The

l,screw is then held against turning by a bolt through the heel plate and screw, as shown in Fig. 3. rlhe groove 10 is now formed by placing the tool shown in Fig. 5, over the stud 15 and forcing the end of the tool into the top of the heel plate, by a blow or pressure on the tool. In thus forming the groove 10 the metal surrounding the recess is forced in against the edge of the collar, forming the undercut wall 9 and rigidly securing or locking the collar in the recess. If after long use the screw should become loosened, it can be easily and quickly tightened by use of the tool, as shown in Fig. or a broken screw can be replaced by a new one and secured as described.

I do not wish to confine myself to the construction shown, as the wall of the recess and the edge of the collar could be shaped in various ways for locking the collar in the recess, in forming the groove in the heel plate.

Having thus described my invention, l'. claim as new:

A heel plate for ice skates having a cen- Vbeveled-edged collar in the recess, a screwtral circular recess and a concentric V-` shaped groove 1n its top, a heel screw screwed into the heel plate and havlng a end, the Wall'of the recess being` pressed over Y and on to the beveled edge of the collar, for

the purpose as shown and described.

In testimony whereoil have signed my threaded stud above the collar and shaped' name-to this-specication.

to have a reduced neck portion swelling into s Y a head portion which. tapers. into a pointed l ERNEST HUN OLD.

Copies of this patent may be obtained for tive cents. each,- by` addressing the Commissioner o! Patents, d Washington). C. 

